Refactored the env module.

I made the creation code a bit faster by avoiding a copy.
Feature---org.conman.table.keepset()

keepset() will check the given table for a field "name".  If nil, sets
t[name] to the given value.  If a table, it will append the value to
t[name] (converting it to a table if needed)
Removed a variable what wasn't being used.
Removed unused line of code
Feature---lead string when wrapping

Make it so we can add some text (say, spaces or tabs) before wrapping
each line.